package com.ruoyi.common.utils;

import java.lang.management.ManagementFactory;
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.*;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

import org.apache.commons.lang3.time.DateFormatUtils;

/**
 * 时间工具类
 * 
 * @author ruoyi
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils
{
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM", 
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     * 
     * @return Date() 当前日期
     */
    public static Date getNowDate()
    {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     * 
     * @return String
     */
    public static String getDate()
    {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime()
    {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow()
    {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format) {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date) {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateTime(final Date date)
    {
        return parseDateToStr(YYYY_MM_DD_HH_MM_SS, date);
    }

    public static final Date parseToDateTime(String str)
    {
        SimpleDateFormat format = new SimpleDateFormat(YYYY_MM_DD_HH_MM_SS);
        Date date = null;
        try {
            date = format.parse(str);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return date;
    }

    public static final String parseDateToStr(final String format, final Date date)
    {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts)
    {
        try
        {
            return new SimpleDateFormat(format).parse(ts);
        }
        catch (ParseException e)
        {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str) {
        if (str == null)
        {
            return null;
        }
        try
        {
            return parseDate(str.toString(), parsePatterns);
        }
        catch (ParseException e)
        {
            return null;
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate()
    {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算相差天数(绝对值)
     */
    public static int differentDaysByMillisecondAbs(Date date1, Date date2) {
        return Math.abs((int) ((date2.getTime() - date1.getTime()) / (1000 * 3600 * 24)));
    }

    /**
     * 计算相差天数(正负差)
     */
    public static int differentDaysByMillisecond(Date date1, Date date2) {
        return (int) ((date2.getTime() - date1.getTime()) / (1000 * 3600 * 24));
    }

    /**
     * 计算时间差
     *
     * @param endDate 最后时间
     * @param startTime 开始时间
     * @return 时间差（天/小时/分钟）
     */
    public static String timeDistance(Date endDate, Date startTime) {
        return timeDistance(endDate.getTime() - startTime.getTime());
    }

    /**
     * 计算时间差
     * @param diff 两个时间的毫秒时间差异
     * @return
     */
    public static String timeDistance(long diff) {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        long ns = 1000;

        String dis = "";
        // 计算差多少天
        long day = diff / nd;
        if (day > 0) dis += day + "天";
        // 计算差多少小时
        long hour = diff % nd / nh;
        if (hour > 0) dis += hour + "小时";
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        if (min > 0) dis += min + "分";
        // 计算差多少秒//输出结果
        long sec = diff % nd % nh % nm / ns;
        if (sec > 0) dis += sec + "秒";
        return dis;
    }

    /**
     * 增加 LocalDateTime ==> Date
     */
    public static Date toDate(LocalDateTime temporalAccessor)
    {
        ZonedDateTime zdt = temporalAccessor.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 增加 LocalDate ==> Date
     */
    public static Date toDate(LocalDate temporalAccessor)
    {
        LocalDateTime localDateTime = LocalDateTime.of(temporalAccessor, LocalTime.of(0, 0, 0));
        ZonedDateTime zdt = localDateTime.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 字符串时间增加秒
     * @return
     */
    public static String addSeconds(String dateTime, int num){
        if (StringUtils.isEmpty(dateTime)) return null;
        Date date = DateUtils.parseDate(dateTime);
        date = DateUtils.addSeconds(date, num);
        return DateUtils.parseDateTime(date);
    }

    /**
     * 字符串时间增加天
     * @return
     */
    public static String addDay(String dateTime, int num){
        if (StringUtils.isEmpty(dateTime)) return null;
        Date date = DateUtils.parseDate(dateTime);
        date = DateUtils.addDays(date, num);
        return DateUtils.parseDateTime(date);
    }

    /**
     * 获取两个日期之间的所有日期 (年月日)
     *
     * @param startDate
     * @param endDate
     * @return
     */
    public static List<String> getBetweenDate(Date startDate, Date endDate) {
        // 声明保存日期集合
        List<String> list = new ArrayList<String>();
        Calendar calendar = Calendar.getInstance();
        while (startDate.getTime() <= endDate.getTime()) {
            // 把日期添加到集合
            list.add(dateTime(startDate));
            // 设置日期
            calendar.setTime(startDate);
            //把日期增加一天
            calendar.add(Calendar.DATE, 1);
            // 获取增加后的日期
            startDate = calendar.getTime();
        }
        return list;
    }
    public static List<String> getBetweenDate(String startDate, String endDate) {
        return getBetweenDate(parseDate(startDate), parseDate(endDate));
    }

    //获取某个日期的开始时间
    public static Timestamp getDayStartTime(Date date) {
        Calendar calendar = Calendar.getInstance();
        if (null != date) calendar.setTime(date);
        calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        return new Timestamp(calendar.getTimeInMillis());
    }

    //获取某个日期的结束时间
    public static Timestamp getDayEndTime(Date d) {
        Calendar calendar = Calendar.getInstance();
        if (null != d) calendar.setTime(d);
        calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH), 23, 59, 59);
        calendar.set(Calendar.MILLISECOND, 999);
        return new Timestamp(calendar.getTimeInMillis());
    }

    public static Date getPreviousDate(int day) {
        // 获取当前时间
        Date currentDate = new Date();

        // 创建一个 Calendar 实例，并设置为当前时间
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(currentDate);

        // 减去一天
        calendar.add(Calendar.DAY_OF_MONTH, -day);

        // 获取减去一天后的时间
        Date previousDate = calendar.getTime();

        return previousDate;
    }

    public static String getLastWeek() {

        LocalDateTime oneWeekAgo = LocalDateTime.now().minusWeeks(1).withHour(0).withMinute(0).withSecond(0);
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        String formattedDateTime = oneWeekAgo.format(formatter);
        return formattedDateTime;
    }

    // 工具方法：将日期时间字符串转换为毫秒时间戳
    public static final Long parseToTimestamp(String dateTimeStr) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); // 匹配 "2025-05-26 00:00:00" 格式
        try {
            Date date = sdf.parse(dateTimeStr);
            return date.getTime(); // 返回毫秒级时间戳（如 1748102400000）
        } catch (ParseException e) {
            throw new IllegalArgumentException("日期格式错误，需为 yyyy-MM-dd HH:mm:ss 格式: " + dateTimeStr, e);
        }
    }

    public static String formatTimestamp(long timestamp) {
        // 时间戳为秒，若为毫秒则使用 Instant.ofEpochMilli(timestamp)
        Instant instant = Instant.ofEpochSecond(timestamp);
        LocalDateTime dateTime = LocalDateTime.ofInstant(instant,  ZoneId.systemDefault());
        return dateTime.format(DateTimeFormatter.ofPattern("yyyy-MM-dd  HH:mm:ss"));
    }

}
